KR0115052Y1 - Transducer - Google Patents
Transducer Download PDFInfo
- Publication number
- KR0115052Y1 KR0115052Y1 KR2019940034751U KR19940034751U KR0115052Y1 KR 0115052 Y1 KR0115052 Y1 KR 0115052Y1 KR 2019940034751 U KR2019940034751 U KR 2019940034751U KR 19940034751 U KR19940034751 U KR 19940034751U KR 0115052 Y1 KR0115052 Y1 KR 0115052Y1
- Authority
- KR
- South Korea
- Prior art keywords
- amplifier
- voltage
- resistor
- output
- variable resistor
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L9/00—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means
- G01L9/02—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning
- G01L9/04—Measuring steady of quasi-steady pressure of fluid or fluent solid material by electric or magnetic pressure-sensitive elements; Transmitting or indicating the displacement of mechanical pressure-sensitive elements, used to measure the steady or quasi-steady pressure of a fluid or fluent solid material, by electric or magnetic means by making use of variations in ohmic resistance, e.g. of potentiometers, electric circuits therefor, e.g. bridges, amplifiers or signal conditioning of resistance-strain gauges
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0083—Converters characterised by their input or output configuration
Abstract
목적 : 압력비를 전기적으로 변환시켜 주는 트랜스듀서Purpose: transducer to convert pressure ratio electrically
구성 : 압력감지기의 출력을 차동증폭기(IC1)으로 차동증폭시켜서 비반전 단자가 접지된 증폭기(IC4)와 저항(R6,R7) 및 가변저항(VR2)로 구성되는 차동전압 증폭회로를 그랜드 기준전압으로 발생시키고 동시에 2차증폭된 전압을 가변저항(VR2)을 통해 증폭비를 조정하도록 되는 트랜스듀서.Composition: A differential voltage amplifier circuit consisting of an amplifier (IC4) with a non-inverting terminal grounded and a resistor (R6, R7) and a variable resistor (VR2) by differentially amplifying the output of the pressure sensor with a differential amplifier (IC1) as a grand reference voltage. And a second amplified voltage at the same time to adjust the amplification ratio through the variable resistor (VR2).
Description
첨부된 도면은 본 고안을 설명키 위한 전기적 회로도이다.The accompanying drawings are electrical circuit diagrams for explaining the present invention.
* 도면의 주요부분에 대한 부호의 설명* Explanation of symbols for main parts of the drawings
R1-R13 : 저항 ZD1: 정전압다이오드R1-R13: Resistor ZD1: Constant Voltage Diode
VR1,VR2 : 가변저항 OC1 : 정밀증폭기VR1, VR2: Variable resistor OC1: Precision amplifier
IC2 : 전압인버터 IC3,IC4,IC5,IC6 : 증폭기IC2: Voltage Inverter IC3, IC4, IC5, IC6: Amplifier
C1,C2 : 콘덴서 Q1,Q2 : 트랜지스터C1, C2: Capacitor Q1, Q2: Transistor
Sensor : 압력 감지기를 의미한다.Sensor: It means a pressure sensor.
본 고안은 3선식 전류 출력형 트랜스듀서에 관한 것으로 특히 액체 또는 기체의 압력을 검출하여 계측이나 제어에 사용하기 쉬운 전기신호로 변환시키는 장치에 관한 것이다.The present invention relates to a three-wire current output transducer, and more particularly, to a device for detecting the pressure of a liquid or gas and converting it into an electrical signal that is easy to use for measurement or control.
종래의 부르돈관식 아나로그형 게이지에 있어서는 단순히 기구적인 변환기와 같은 변화를 가시화 시킨것이므로 사용자가 원하는 방법으로 직접 접속하여 응용할 수 가 없는 결점이 있었을 뿐만 아니라 원거리 전송시 신호의 감소를 초래하여 정확한 계측이 불가능한 점이 있다.In the conventional Bourdon tube type analog gauge, since the change such as a mechanical transducer is visualized, there is a drawback that cannot be directly connected and applied by a user's desired method. This is impossible.
본 고안은 상기와 같은 점을 감안하여 초정밀급 증폭기를 적용하여 사용자가 원하는 방법으로 직접 응용이 가능하고 또 전기적 신호를 송출시 신호량의 감소없이 정확한 값을 수신부에 전달하여 정확한 계측이나 제어가 가능도록함에 있다.In consideration of the above, the present invention can be directly applied by a user's desired method by applying an ultra-precision amplifier, and it is possible to accurately measure or control by transmitting accurate values to the receiver without reducing the amount of signals when transmitting electrical signals. To be in.
이하 본고안을 첨부된 실시예의 회로도에 따라 상술한다.Hereinafter, the present invention will be described in detail with reference to the circuit diagram of the attached embodiment.
도면에서 Sensor 는 압력감지기로 이와 같은 압력감지기를 구동시키기 위한 전원으로는 정전압 다이오드(ZD1)을 통해 융통성 있게 원하는 전압값으로 조절하는 증폭기(IC4)를 통해 공급하도록 되고, 그 일부는 콘덴서(C1,C2) 및 전압인버터(Voltage Inverter)(IC2)를 통해 정밀급 증폭기(IC1)의 (-)전원으로 공급하도록 되어 있다.In the figure, the sensor is a pressure sensor, and the power for driving such a pressure sensor is supplied through the constant voltage diode ZD1 through the amplifier IC4, which is flexibly adjusted to the desired voltage value, and part of the capacitor C1, C2) and voltage inverter (IC2) are supplied to the negative power of precision amplifier IC1.
한편, 상기한 압력감지기(Sensor)의 출력은 저항(R1,R2)를 통해 정밀급 증폭기(IC1)의 입력측에 연결되고 증폭기(IC1)는 저항(R4,R5)에 의해 1 차 증폭된 신호는 저항(R6)을 통해 2차 증폭기(IC3)의 입력측에 연결하여, 차동증폭부를 형성하고, 비반전 단자를 접지시킨 2차 증폭기(IC3)는 저항(R6,R7) 및 가변저항(VR2)에 의해 2차증폭되어 증폭기(IC5,IC6)과 NPN형 트랜지스터(Q1)와 PNP형 트랜지스터(Q2)와 저항(R11,R12,R13)으로 구성되는 전압-전류 변환회로를 통해 출력측(OUT)로 출력되도록 하여서 된 것이다.On the other hand, the output of the pressure sensor (Sensor) is connected to the input side of the precision amplifier (IC1) through the resistor (R1, R2) and the amplifier (IC1) signal amplified first by the resistor (R4, R5) The secondary amplifier IC3, which is connected to the input side of the secondary amplifier IC3 through the resistor R6 to form a differential amplifier, and the non-inverting terminal is grounded, is connected to the resistors R6 and R7 and the variable resistor VR2. By the second amplifier and output to the output side (OUT) through a voltage-to-current conversion circuit composed of amplifiers (IC5, IC6), NPN transistor (Q1), PNP transistor (Q2), and resistors (R11, R12, R13). It was made as possible.
도면중 미설명부호(R3,R8,R9,R10)은 저항이며, VR1은 가변저항을 그리고Vcc는 전원을 의미한다.In the drawings, reference numerals R3, R8, R9, and R10 denote resistors, VR1 denotes a variable resistor, and Vcc denotes a power source.
상기와 같은 구성으로 되는 본 고안에 있어서 정전압다이오드(ZD1)을 통해 정전압되는 전압은 저항(R8,R9)와 전압인버터(IC2)를 통하여 원하는 전압값으로 조절되어 압력감지기(Sensor )에 공급됨과 동시에 일부의 전압은 전압인버터(IC4)와 콘덴서(C1,C2)를 통해 1차증폭기(IC1)의 (-)전원으로 공급되어 압력감지기(Sensor )의 압력변화에 따른 변화된 신호가 저항(R1,R2)를 통해 상기한 1차증폭기(IC1)의 입력측에 인가되는 경우 저항(R4)와 저항(R5)에 의해 1차증폭된 신호는 저항(R6,R7)과 비반전단자를 접지시킨 증폭기(IC3)에 의해 접지 기준값으로 2차 증폭되며 가변저항(VR2)에 의해 원하는 만큼의 증폭비를 얻을 수가 있게 된다.In the present invention having the configuration as described above, the constant voltage through the constant voltage diode (ZD1) is adjusted to the desired voltage value through the resistor (R8, R9) and the voltage inverter (IC2) is supplied to the pressure sensor (Sensor) Some voltages are supplied to the negative power of the primary amplifier IC1 through the voltage inverter IC4 and the capacitors C1 and C2 so that the changed signals according to the pressure change of the pressure sensor are resistors R1 and R2. When applied to the input side of the primary amplifier (IC1) through the (), the signal primary amplified by the resistor (R4) and resistor (R5) is the amplifier (IC3) to ground the resistor (R6, R7) and the non-inverting terminal 2) amplified to the ground reference value by 2) and the desired amplification ratio can be obtained by the variable resistor VR2.
따라서 각 증폭부의 증폭기들은 반도체의 특성상 초기 오프셀(OFFSET) 값을 지니고 있으므로 이를 보완하기 위하여 본 고안에서는저항(R2)의 전단에 저항(R3)과 가변저항(VR1)을 통해 이를 보완할 수가 있게된다.Therefore, in order to compensate for this, the amplifiers of each amplification part have an initial off-cell value due to the characteristics of the semiconductor. Therefore, in the present design, the amplifier R3 and the variable resistor VR1 can be compensated for by the front end of the resistor R2. do.
한편 2차 증폭된 신호는 증폭기(IC5)와 증폭기(IC6) 및 NPN형 트랜지스터(Q1)와 PNP형 트랜지스터(Q2) 그리고 저항(R11,R12,R13)구성되는 접지된 전압-전류 변환기를 통해 전류값으로 변환되어 출력측(OUT)에 출력되는 것이다.On the other hand, the secondary amplified signal is supplied through a grounded voltage-to-current converter composed of an amplifier IC5, an amplifier IC6, an NPN transistor Q1, a PNP transistor Q2, and resistors R11, R12, and R13. It is converted to a value and output to the output side (OUT).
즉 부트스트랩 효과에 의해 증폭기(IC5)의 반전 입력값과 같게되는 것이며, 이를 Vin이라 할 때 트랜지스터(Q1)을 통과하는 전류는 i는That is, due to the bootstrap effect, it is equal to the inverting input value of the amplifier IC5. When Vin is defined, the current passing through the transistor Q1 is i
i≒Vin/R11(또는 R12,R13)i ≒ Vin / R11 (or R12, R13)
이 된다. 이와 같은 전류가 콜랙터전압 Vc(Vc=Vcc-Vin)을 만드는 것이다. 이와 같은 전압 Vc는 트랜지스터(Q2)의 비 반전 입력을 구동시키고 반전 입력은 근사적으로 Vcc-Vin이 되어 저항(R13)에 걸리는 전압이Becomes This current makes the collector voltage Vc (Vc = Vcc-Vin). This voltage Vc drives the non-inverting input of transistor Q2 and the inverting input approximately becomes Vcc-Vin so that the voltage across resistor R13 is
Vcc-(Vcc-Vin)=VinVcc- (Vcc-Vin) = Vin
이 되고 출력전류 Iout는And output current Iout is
Iout≒Vin/R13Iout ≒ Vin / R13
이 되는 것이다.It will be.
상기와 같이 반전된 신호는 출력단(OUT)을 통해 접지 사이에 연결되는 부하에 인가압력에 대하여 일정 비율의 변화량을 전류신호로서 공급할 수가 있게되는 효과를 얻을 수가 있어서 종래 볼 수 있던 원거리 송신시의 신호량의 감소없이 정확한 값을 수신부에 전달할 수가 있어서 정확한 계측이나 제어를 할 수 있게 되는 실용적인 고안인 것이다.The inverted signal as described above can obtain the effect of supplying a certain amount of change as a current signal with respect to the applied pressure to the load connected between the ground via the output terminal OUT, so that the signal at the time of the conventional transmission can be seen. It is a practical design that can deliver accurate values to the receiver without reducing the quantity, allowing accurate measurement and control.
Claims (2)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019940034751U KR0115052Y1 (en) | 1994-12-20 | 1994-12-20 | Transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR2019940034751U KR0115052Y1 (en) | 1994-12-20 | 1994-12-20 | Transducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR960025788U KR960025788U (en) | 1996-07-22 |
| KR0115052Y1 true KR0115052Y1 (en) | 1998-04-15 |
Family
ID=19401957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR2019940034751U KR0115052Y1 (en) | 1994-12-20 | 1994-12-20 | Transducer |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR0115052Y1 (en) |
-
1994
- 1994-12-20 KR KR2019940034751U patent/KR0115052Y1/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| KR960025788U (en) | 1996-07-22 |
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